Microscan MS-96 Manual de usuario Pagina 36

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RS-232/422 Host Port
3-6 MS-9 Scanner User’s Manual
Multidrop
Note: See also “Multidrop Communications” on page A-32.
Note: Scanners linking up to a Microscan MS-5000 multidrop concentrator must be
configured in standard multidrop protocol.
User Defined Point-to-Point
User Defined Address
User Defined Example
Usage: The MS-5000 can be used as a concentrator to a single host port connec-
tion.
Definition: Multidrop allows up to 50 devices to be connected to a single RS-485
host, with the scanner assigned an unique address (from 01 to 50). When
Multidrop is selected, the protocol characters for RES, REQ, etc. are
assigned automatically.
Multidrop
Addresses:
Each address has its own separate poll and select address (from 1C to 7F
hex).
Options: 01 through 50
Serial Cmd: If selecting Multidrop <K140,5> fan address must be defined and
appended to the command string.
Format: <K140,5,address[01 to 50]>
Usage: Used for developing custom protocols in polled or unpolled mode.
Definition: User Defined Point-to-Point allows the user to customize the point-to-
point protocol.
Serial Cmd: <K140,6,RES,address,REQ,EOT,STX,ETX,ACK,NAK,from host>
Definition: User Defined is considered to be in a polled mode only if an address has
been assigned.
Serial Cmd: <K140,6,RES,address,REQ,EOT,STX,ETX,ACK,NAK,from host>
Default: No address
Options: Any ASCII character except a null.
Example: An ACK/NAK protocol can be configured using User Defined. The scan-
ner will transmit data to the host when an ACK is received. If a NAK or
response timeout occurs, the scanner will re-send the data to the host up
to 3 more times before aborting.
Serial Cmd: <K140,6,RES,address,REQ,EOT,STX,ETX,ACK,NAK,from host>
Default: No assignment
Options: Any ASCII character except a null. Control characters can be used to
define RES through NAK in serial commands.
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